package com.hxkcloud.patient.views;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Shader;
import android.util.AttributeSet;
import android.view.View;

import com.hxkcloud.patient.R;

/**
 * Created by wyd on 2017/7/31.
 */

public class SpringProgressView extends View {

    /**分段颜色*/
    private int[] SECTION_COLORS;
    /**进度条最大值*/
    private float maxCount;
    /**进度条当前值*/
    private float currentCount;
    /**画笔*/
    private Paint mPaint;
    private int mWidth,mHeight;

    private Context mContext;

    public SpringProgressView(Context context, AttributeSet attrs,
                              int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initView(context);
    }
    public SpringProgressView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initView(context);
    }
    public SpringProgressView(Context context) {
        super(context);
        initView(context);
    }

    private void initView(Context context) {
        this.mContext = context;
        SECTION_COLORS = new int[]{mContext.getResources().getColor(R.color.low), mContext.getResources().getColor(R.color.middle), mContext.getResources().getColor(R.color.high)};
    }
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        mPaint = new Paint();
        mPaint.setAntiAlias(true);
        int round = mHeight/2;
        System.out.println("max="+maxCount + "  current="+currentCount);
        mPaint.setColor(mContext.getResources().getColor(R.color.progress_bg));
//        RectF rectBg = new RectF(0, 0, mWidth, mHeight);
//        canvas.drawRoundRect(rectBg, round, round, mPaint);
//        mPaint.setColor(Color.BLACK);
        RectF rectBlackBg = new RectF(2, 2, mWidth-2, mHeight-2);
        canvas.drawRoundRect(rectBlackBg, round, round, mPaint);

        float section = currentCount/maxCount;
        RectF rectProgressBg = new RectF(3, 3, (mWidth-3)*section, mHeight-3);
        if(section <= 1.0f/3.0f)
        {
            if(section != 0.0f)
            {
                mPaint.setColor(SECTION_COLORS[0]);
            }else
            {
                mPaint.setColor(Color.TRANSPARENT);
            }
        }else
        {
            int count = (section <= 1.0f/3.0f*2 ) ? 2 : 3;
            int[] colors = new int[count];
            System.arraycopy(SECTION_COLORS, 0, colors, 0, count);
            float[] positions = new float[count];
            if(count == 2)
            {
                positions[0] = 0.0f;
                positions[1] = 1.0f-positions[0];
            }else
            {
                positions[0] = 0.0f;
                positions[1] = (maxCount/3)/currentCount;
                positions[2] = 1.0f-positions[0]*2;
            }
            positions[positions.length-1] = 1.0f;
            LinearGradient shader = new LinearGradient(3, 3, (mWidth-3)*section, mHeight-3, colors,null, Shader.TileMode.MIRROR);
            mPaint.setShader(shader);
        }
        canvas.drawRoundRect(rectProgressBg, round, round, mPaint);
    }

    private int dipToPx(int dip) {
        float scale = getContext().getResources().getDisplayMetrics().density;
        return (int) (dip * scale + 0.5f * (dip >= 0 ? 1 : -1));
    }

    /***
     * 设置最大的进度值
     * @param maxCount
     */
    public void setMaxCount(float maxCount) {
        this.maxCount = maxCount;
    }

    /***
     * 设置当前的进度值
     * @param currentCount
     */
    public void setCurrentCount(float currentCount) {
        this.currentCount = currentCount > maxCount ? maxCount : currentCount;
        invalidate();
    }

    public float getMaxCount() {
        return maxCount;
    }

    public float getCurrentCount() {
        return currentCount;
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec);
        int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec);
        int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec);
        int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec);
        if (widthSpecMode == MeasureSpec.EXACTLY || widthSpecMode == MeasureSpec.AT_MOST)
        {
            mWidth = widthSpecSize;
        } else
        {
            mWidth = 0;
        }
        if (heightSpecMode == MeasureSpec.AT_MOST || heightSpecMode == MeasureSpec.UNSPECIFIED)
        {
            mHeight = dipToPx(15);
        }
        else
        {
            mHeight = heightSpecSize;
        }
        setMeasuredDimension(mWidth, mHeight);
    }
}
